Ruben's Thursday Challenge
Ruben was inspired by the video about light being the fastest thing in the universe so he started looking up the speed of other fast things and comparing them. He found that light was definitely the fastest. Then he decided to make an experiment to see how a magnifying glass affects light. Ruben thought that the magnifying glass might make the light stronger and hotter, so he tried to use it to melt an ice cube.
What fantastic self-initiated learning!